Core for use in making electric storage-battery plates.



G. H RABENALT.

CORE FOR USE m MAKING ELECTRIC STORAGE BATTERY PLATES APPLICATION FiLED NOV. 17. 1914.

Patented J uly 25, 1916.

anbawtpz GUSTAV H. RABENALT, OF BUFFALO, NEW YORK.

CoRE FOR USE IN MAKING ELECTRIC STORAGE-BATTERY PLATES.

Specification of Letters Patent.

Patented July 25, 1916.

Application filed November 17, 1914. Serial No. 872,592.

T 0 all whom it may concern Be it known that I, GUSTAV H. RABENALT, a citizen of the United States, and a resident of the city of Buffalo, county of Erie, and State of New York, have invented certain new and useful Improvements in Cores for Use in'Making Electric Storage-Battery Plates, of which the following is a specification.

My invention relates to cores for use in making electric storage battery plates, and particularly to those known as duplex plates, such, for instance, as disclosed in application of Rufus N. Chamberlain, Serial No. 824,599, filed )Iarch 14, 1914.

In the manufacture of plates of the above character it is necessary to place cores in the spaces, which subsequently form acid channels, in order that when pasting the plate the entire casting will not form a solid plate. After the paste, which subsequently constitutes the active material of the plate. has been placed in position, it is desirable that the cores-be removed in order to leave a free and open channel for the circulation of acid. These channels in plates as ordinarily constructed range from one-thirtysecond to one-sixteenth of an inch in'thickness. Consequently the cores which form these spaces are very thin.

In casting the grid it necessarily has some unsmooth places so that the cores do not always readily and easily go into place. After the plates have been pasted the cores are held quite tightly in position by the active material bearin upon both sides of the core. In view of tlie above considerations it is necessary that the core have considerable'strength so that when it is desired to place the core in the grid it may be forced into position notwithstanding the fact that it may encounter some resistance due to the unsmooth portions of the cast grid. Likewise -it is necessary to have this strength in removing the core from the pasted plate, otherwise, the core is liable to break in parts and render the plate worthless. Another consideration is that the material from "which the cores are made should either be inherently acid-resistant, or should be sup plied with some material which will render it acid-resistant. sideration in this connection is that the core should contain some substance which will act as a lubricant between the paste and the core. This is important for "the reason A still further cona core which will avoid the disadvantages above recited and,.on the other hand, possess all of the advantageous features necessary in the manufacture of this type'of plate-that is, a core having comparatively great strength, being acid resistant, either inherently or rendered so, and having the necessary lubricating qualities,'either inhercnt or being treated with a substan e giving the necessary qualities.

My invention will bemore fully understood by reading the following description,

taken in connection with the accompanying drawings, which form a part of this specification, and in which Figure 1 shows a perspective view of the core; and Fig. 2 shows an enlarged section.

The core shown in Fig. 1 may be of any.

desired dimensions. At present, I prefer to make the core up of a mechanically strong member 1 with a coating of acid-resistant material 2 thereon, and a coating of lubricant 3 on the acid-resistant material. I'have found, by experience, that the member 1' may be satisfactorily made of steel, and the coating 2 may be madeof lead. and the coating 3 may be made of paraffin. This combination gives a mechanically strong core with the acid-resistant feature, and also a lubricating feature, the importance of all of which has been above stated.

It is found that when the core is complete it will have the three features of strength, arid-resistanee and the necessary lubricating qualities. It is immaterial as far as my invention is concerned whether all these qualities are found in a single piece of suitable material or that some two of these qualities are possessed by one material and the other supplied by some treatment adding the third quality to it. For instance. a material which has the necessary strength and 's acid-resistant may be treated with paraffin, or some other lubricant, or some other material which has the acid-resistant and lula'ieating features, and which will not/he meehanieally strong enough for this purpose may he used as a coating on a steel or other strong memher to give the necessary strength.

In view of the above disclosure, I do not. limit, my invention to the speeilie em hodilnent almve leserihul hut intend that my claims shall include equivalent forms of the device.

In the .follmving claims 1 have used the. Word rigid in the sense that it designates a memher or memhers having the qualit of inherent; strength, tensile or compressive such as steel and not in the sensethat the device. is not flexible.

Having described my .invention \vhat I claim as ne\v and desire to secure h v Letters Patent is:

l. A core. for use in mak-ii'ig duplex storage battery plates, comprising: a memher of from adhering thereto.

It. A core for use in making duplex storage. battery plates Comprising a thin pieee ot' non-fragile.material hem}; fl(l tlltft\li-;tiltlt,

and l|:1\'lll J sutlieient lnhrieatiug: qualities to allmv it. t he readily removed from a plate a l ter the same has heeu pasted and (lJiWl or hardened. I

'l. core for use in makin; duplex storage hatter v pl-:tes comprising a mem lerol' non-fragile material whi h is n t attaeked hy sulfuric aeid and ha vine a material thereon for luhrieatin said memheig \\'ll(| 't it may he placed in .position la'l ore the plate is pasted and l'eadil removed therefrom after it is pasted. U

5. eore for use in making duplex storage hatter) plates. eonrprisinga thin |Iit('(' of steel havinjj'a roatinjgrot lead thereon to render it aei'd-proof and a coating; of para t tin thereon to luhrirate-it sin that, iti'nay hew readily removed from the plateatter it is pasted \vithout injury to said paste.

t1. core for use in making duplex stor age hatter) plates. ro1nprisin;' a thin pier!- of steel havin; a eoatin; ol lead thereon to n-mh-l it arid-proof and a eoatin; of paratlin thereon to lulrrirate it so that. it may he re-aditv removed from the plate after it is pasteih and dried or l|ar le| ie l \v-ithout injur v to said paste. v

in testiumu v \vhereot l have signed in nan/- to this speeiliez'itioin in tluprese.|u-.e o'l' tvvo :a'd|.\'erihin; witnesses.

GUSTAV ll. lt.\llll.\"-.\l/l. \\''itnesses: i

.\'i-:\v'ro.\' llizmzrlss, llmvix l Slim-1n. 

